[143] [cap.24] Since, then, life is full of all this irregularity, and confusion, and indistinctness, it is necessary that the statesman as well as the philosopher should approach the science of the interpretation of dreams, so as to understand the dreams and visions which appear by day to people who believe themselves to be awake, being guided by probable conjectures and rational probabilities, and in this way he must explain each separate one, and show that such and such a thing is honourable, another disgraceful, that this is good or that is bad; that this thing is just, that thing is on the contrary unjust; and so on in the same way with respect to prudence, and courage, and piety, and holiness, and expediency, and usefulness; and in like manner of the opposite things, with respect to what was not useful nor reasonable, what was ignoble, impious, unholy, inexpedient, pernicious, and selfish.